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</script>
<input type="text" id="num" onmouseout="test()"/>
<script>
function test(){
var text=document.getElementById("num").value;
text=parseInt(text);
if(!(text<90&&text>16)) alert("please enter a right number again...");
else return;
}
</script>
</script>
<input type="text" id="num" onmouseout="test()"/>
<script>
function test(){
var text=document.getElementById("num").value;
console.log(text);
text=parseInt(text);
console.log(text==45);
if(!(text<90&&text>16)) alert("please enter a right number again...");
else return;
}
</script>